Rail-joint.



P. HOOH.

RAIL JOINT.

APPLICATION rum) mm 9, 1910.

1,018,494. Patented Feb. 27, 1912.

| l I i .l. 'i I l l l WlTNESSES NVENT R.

Fran H k 14 :7 W I W f 5 UNITED STATES kATENT OFFICE FRANZ HOCH, OF FRANKFORT-ON-THE-MAIN, GERMANY.

RAIL-Joint.

1,018,494. Specification of Letters Patent. Patented Feb, 27, 1912,

' Application filed June a, 1910. Serial No. 566,083.

To, all whom it may concern Be it known that I, FRANZ HooH, a subjeot of the German Emperor, and residing which'a continuous splice-bar clasps the ends of the rails.

The principal cause of the destruction of joint-fittings is the existence of excessive play in the fishing-surfaces of the joint-fittings customary at the present day. Attempts have constantly been made, with the most various shapes of lateral splice-bars, to do away with this play, but without heretofore finally remedying the defect. With the same end in View, joint-fittings comprising shoes and keys have been variously arranged heretofore because the key is excellently adapted as a joint-fitting for obtaining atight closure at the faces. But a satisfactory result could not be obtained heretofore with these known means. The reason of the defective behavior of such joints may be found in the arrangement having one key,.as will be understood from the following considerations: Owing to'the vertical pressure which is applied on the head of the rail from the inside edge to the axis of the rail a, moment occurs which turns .inward, bends the web in this direction,

and turns and twists the section of the rail. It consequently follows that the portions within the section of the rail are subjected to small distortions, and consequently the distance between the fishing-surface under the head of the rail and that under the base or flange of the rail changes. In the case of continuous splice-bars which themselves support the head of the rail the fishingsurfaces under the head of the rail are worn more than those under the flange of. the rail.

neously, however, the base of the curely supported.

But when the amounts of wear are diflerent, in an arrangement having one key above the base of the rail it is not possible to obtain uniform pressure on the two fish ing-surfaces by tightening up the key; only the base of the rail can be securely tightened in its seat.

Now a primary object of my invention is to provide the continuous splice-bar, which is well-known per so, with keys in such manner that their wedge-surfaces tighten the union of the splice bar with the rail both at its head and at its base. I can attain this end by arranging the keys resting against the head and against the flange of the rai1, on the one hand, and providing corresponding guides in the continuous splice-bar, on the other hand, or by tensioning the keys relatively to one another and simultaneously tightening the continuous splice-bar, or by'other like constructional forms, in which the head and the base of the rail are clamped by longitudinal wedgesurfaces and the continuous splice-bar is pressed against the bottom of the flange of the rail.

One illustrative embodiment of my invention is represented by way of example in the accompanying drawing, wherein v Figure 1 is avertical transverse section, and Fig. 2 a side elevation, partly in section on the bent line a?). Referring to the drawing, thejoint-fittings comprise the continuous splice-bar L' and the keys or wedges K K F and F The splice-bar clasps the base of the rail S in Well-known manner, whereby the same is supported. The keys F and F, guided in the splice-bar are provided above the base of the rail. In additio n to these keys I arrange guides for Myra K and K on the top of the splice-bar.

The keys can be driven, fully utilizing thewedging action, so that'such a close fit is obtained at the head and at the base of the rail that an actually clamped connection is made, in which the play in 'the'fishing-surfaces losses its injurious eflect'. Simultarail. is se- These joint-fittings may be thought of as twolatera-l splice-bars connected under the base of the rail, in which Wedges are arranged between the splice-bars and the head and base of the rail. But" these lateral splice-bars carry the rail not only at the head, but support it under the base inad'dition.

The base of the rail maybe supported in the well-known ways, either directly by its resting with its entire face on the splicebar, or by means of fillets or ribs which may be provided in the splice-bar for improving the support of the rail, or by means of a key which adjusts the supporting-surfaces and causes the rail to be supported on the splice-bar.

When the c'ontinuouslsplice-bar is formed as a chair the same arrangement can be em-' ployed for a firm resting joint.

I claim In a rail joint,- the combination, with a rail, of a continuous splice-bar clasping the r base thereof, a wedge at each side of the web of-the rail driven between the splicebar and the upper faces of the flange of the rail, and a wedge at each side of the web of the rail driven between the upper faces of the splice-bar and the head of the rail, eachwedge being guided in the splice-bar, substantially as shown, for the purpose specified.

In testimony whereof I have signed my name to this specification in the presence of two witnesses.

FRANZ noon.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington; D. G. 

